Maybe comprimise is to just take off the Compressor, A?C radiator and hoses from the engine compartment. Will also eliminate that additional drag.
Maybe taking out the heater system will also loose some weight, along with a bunch of hoses.
Probably toss the radio and amp while you are at it.
These could also be easily reinstalled if you later desire to sell the car. (perish the thought)
Track car has a harder time loosing weight because while you are tossing out creature comforts, you are adding heavier safety/performance goodies.
I Remember when Eric Messley was lightening Ron's car, he took out so much weight the car actually began to handle poorly, and the suspension needed to be reconfigured to deal with the ligher weight.